For a while I lived about a half mile from "Steamers Lane" in Santa Cruz, Ca. that looks alot like the coast you've depicted on an average day the waves could get to 20 feet. Under stormy conditions the breakers would spray the tops of the cliffs(apx 75-100 feet). The waves are fine - I'd say the ship should be alot bigger, closer to the foreground. But then you have a whole new set of problems as the ship becomes the subject of the scene. wakes, seaspray, list, draft, apparent wind direction and texturing the ship. either way it looks to me that it is the ship that is too small. Very good for a first attempt.